U.S. Patent Act
..Part II. Patentabililty of Inventions and Grant of Patents
....Chapt. 10. Patentability of Inventions
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Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title [35 USCS Sects. 1 et seq.].
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